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Hydrotreatment and catalytic cracking combined processing method of residual oil

A catalytic cracking and combined processing technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of underutilization of substances and reduction of catalyst activity, etc., achieve high conversion rate, increase hydrogen content, increase conversion rate effect

Inactive Publication Date: 2015-12-30
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The combined processing method of residual oil hydrotreating and catalytic cracking is an emerging clean reprocessing technology for advanced treatment of residual oil, which can increase the yield of light oil and reduce the yield of coke. However, due to the presence of a certain amount of metal in the residual oil , the activity of the catalyst is reduced in the catalytic cracking step, and the material after the hydrogenation reaction of catalytic cracking heavy diesel oil is not fully utilized. An improved combined processing method of residue hydrotreating and catalytic cracking still needs further research and development. to develop

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A combined processing method of residual oil hydrotreating and catalytic cracking in this embodiment comprises the following steps:

[0020] (1) Under the presence of hydrogen and hydrogenation catalyst, carry out hydrogenation reaction in the hydrotreating unit with residual oil, catalytic cracking heavy diesel oil, and optional oil slurry distillate, the hydrogen partial pressure is 10MPa, and the temperature is 350 °C, the volume ratio of hydrogen to the material to be hydrogenated is 1000:1, and the volumetric space velocity of the material to be hydrogenated is 0.5h -1 , to obtain gas, naphtha, hydrogenated diesel oil and oil slurry distillate;

[0021] (2) After steaming out gasoline and diesel oil, utilize maleic anhydride-acrylamide-methacrylic acid copolymer demetallization agent to carry out demetallization treatment to liquid phase stream and carry out pretreatment to liquid phase stream, reduce metal content;

[0022] (3) Under catalytic cracking conditions...

Embodiment 2

[0025] A combined processing method of residual oil hydrotreating and catalytic cracking in this embodiment comprises the following steps:

[0026] (1) Residual oil, catalytic cracking heavy diesel oil, optional oil slurry distillate, in the presence of hydrogen and hydrogenation catalyst, carry out hydrogenation reaction in a hydrotreating unit, the hydrogen partial pressure is 8MPa, and the temperature is 350 -370°C, the volume ratio of hydrogen to the material to be hydrogenated is 800:1, and the volumetric space velocity of the material to be hydrogenated is 1.2h -1 , to obtain gas, naphtha, hydrogenated diesel oil and oil slurry distillate;

[0027] (2) After steaming out gasoline and diesel oil, utilize maleic anhydride-acrylamide-methacrylic acid copolymer demetallization agent to carry out demetallization treatment to liquid phase stream and carry out pretreatment to liquid phase stream, reduce metal content;

[0028] (3) Under catalytic cracking conditions, the pretr...

Embodiment 3

[0031] A combined processing method of residual oil hydrotreating and catalytic cracking in this embodiment comprises the following steps:

[0032] (1) Residual oil, catalytic cracking heavy diesel oil, optional oil slurry distillate, in the presence of hydrogen and hydrogenation catalyst, carry out hydrogenation reaction in the hydrotreating unit, the hydrogen partial pressure is 12MPa, and the temperature is 380 -400°C, the volume ratio of hydrogen to the material to be hydrogenated is 1200:1, and the volumetric space velocity of the material to be hydrogenated is 1.8h -1 , to obtain gas, naphtha, hydrogenated diesel oil and oil slurry distillate;

[0033] (2) After steaming out gasoline and diesel oil, utilize maleic anhydride-acrylamide-methacrylic acid copolymer demetallization agent to carry out demetallization treatment to liquid phase stream and carry out pretreatment to liquid phase stream, reduce metal content;

[0034] (3) Under catalytic cracking conditions, the p...

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Abstract

The invention provides a hydrotreatment and catalytic cracking combined processing method of residual oil. The method comprises the following steps: (1) carrying out the hydrogenation reaction of residual oil, catalytic cracking diesel fuel oil and slurry oil steamed extract in a hydrotreatment device in the existence of hydrogen and a hydrogenation catalyst to obtain gas, naphtha, hydrogenation fuel oil and slurry oil steamed extract; (2) after the gasoline and diesel are steamed out, preprocessing the liquid flow, and reducing the content of metal; (3) facilitating the preprocessed liquid flow to sufficiently contact gas oil and the catalytic cracking catalyst to obtain dry gas, liquefied gas, gasoline and catalytic cracking diesel fuel oil, and separating the catalytic cracking diesel fuel oil; (4) in the existence of the diesel hydrogenation catalyst, facilitating the catalytic cracking diesel fuel oil to sufficiently contact the hydrogen, carrying out the hydrogenation refining reaction, circulating the hydrogenated catalytic cracking diesel fuel oil to the step (3), and circulating the residual catalytic cracking diesel fuel oil to the step (1). The method has the beneficial effect that the yield of light oil is increased.

Description

technical field [0001] The invention belongs to the technical field of residue oil processing, and in particular relates to a combined processing method of residue oil hydrotreating and catalytic cracking. Background technique [0002] Petroleum is a non-renewable energy source. my country's imported crude oil is showing a rapid growth trend. In recent years, the price of crude oil has been rising. Benefits are also of great significance to my country's energy security. [0003] The combined processing method of residual oil hydrotreating and catalytic cracking is an emerging clean reprocessing technology for advanced treatment of residual oil, which can increase the yield of light oil and reduce the yield of coke. However, due to the presence of a certain amount of metal in the residual oil , the activity of the catalyst is reduced in the catalytic cracking step, and the material after the hydrogenation reaction of catalytic cracking heavy diesel oil is not fully utilized. ...

Claims

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Application Information

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IPC IPC(8): C10G67/02
Inventor 丁巍赵云鹏戴咏川宋官龙刘添智
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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